A/N: Another teen Phinbella drable containing some mature themes! Short and sweet with a few chuckles thrown in for fun!

Practice

Isabella stared listlessly at the dawn sun filtering in through her blinds, bathing the darkened room in glowing horizontal stripes. She let a few strands of her hair fall in front of her eyes, blocking out the summer morning light and letting her relax a bit longer. She had been mentally awake for awhile, but her body pleaded for more rest and the steady rise and fall of her 'pillow' was the perfect lullaby.

Phineas was still dead asleep, one arm tucked behind his head under the pillow and his other draped across Isabella's bare back. She was content to just take in the little details of the moment. Her warm cheek on his bare chest. The sound of his soft, even breaths. Her silken bed sheets she would have to clean later that day…

It had been the first night he'd spent at her place. Technically it was the first night they had spent together in either one of their rooms. A risky endeavor for any sixteen year old, but her mother and father were gone for the night, spending their anniversary out of town. She rarely took advantage of her parent's trust, but the opportunity was too golden.

Isabella was having a hard time being away from her boyfriend recently. Having an even harder time keeping her hands off him. A week earlier, Phineas had swept her away to Paris for a night and she was still reeling from his bold move. Blindfolded the entire flying car ride there, she had nearly melted into a puddle when he removed the cloth and her first sight was the Eifel Tower all lit up on a beautiful night. She loved Paris, even if their first time there had been less than ideal. And she loved that he wanted to make it up to her. To give her the special night she'd been wanting for quite awhile. She adored how much of a gentleman Phineas was, and unlike most boys their age, a physical relationship was not his priority. But Isabella had made it clear a year after they were dating that she was ready. And she would wait till he was.

The surprise trip had been his way of telling her he finally was.

Their first night together had been a glorious mixture of magic and passion…along with a heavy dose of nerves, awkward apologies, and muffled giggling. Neither cared though. The fact that it hadn't been perfect, actually made it perfect. That the majority of the night was just spent holding one another and nothing more.

Holding was nice, but since that night they were trying to get more practice in. Which at their age involved a lot of sneaking around. Luckily, they had outstanding reputations. Which meant a little white lie here and there about a sleep over with the girls, or a late table top gaming night with the boys was enough to throw their parents' off their scent. Initially they both felt bad about making up stories, but any guilt was forgotten as soon as they were alone. The fruit of temptation was just too sweet to resist.

Alibis were easier to come by then locations. So far their options had been limited to Phineas and Ferb's car and the supply room closet of the school auditorium after Glee club practice. So when Isabella's bedroom was free to be christened, neither had given a second thought.

And in Isabella's humble opinion, the practice was paying off. While it didn't take much for her to make Phineas a happy camper, her boyfriend was putting his ability to learn fast to good use. He had mastered the Rubix cube that was her bra clasp and no longer felt like he needed to ask permission for every little movement his hands made. It was lasting longer and Phineas was queuing in to different ways to make sure Isabella was just as pleased as he was. They were both still fledglings when it came to love making, but they were enjoying getting to know one another's bodies on a new level.

Isabella opened one eye when a light buzz sounded from her night stand. The orange smart phone vibrated once more, nudging the purple one beside it. She gingerly reached over to pick it up, swiping her thumb to activate the screen. A group text to Phineas and his brother from 'Mom' flashed across the top and Isabella tapped it.

'Off to work. Text when you two get home.'

Isabella nuzzled her cheek against Phineas' shoulder as she typed a response for him, going along with the cover story they had agreed on. 'Still at Baljeet's. Be back before you and Dad get home.'

They had all morning and afternoon to spend together before her own parents were due home. Her mind went through all the things they could do like going out for breakfast or an early morning run. But 'staying in bed' seemed like the most appealing of all the possibilities. Another buzz from Phineas' phone had her checking the screen again.

'You still 'at my house' lover boy?'

She smirked at Baljeet's message, amused that those three were up this early. 'He's mine. You'll never see your precious leader again – Izzie'

Her movement made Phineas shift under her, his hand moving up to run through her hair as he slowly came out of his slumber. "Whatcha dooin?" his gravelly, sleep laden voice mocked her catch phrase as he craned his neck a bit to kiss her head.

"Holding you hostage," she hummed as she continued to swap texts with their friend.

"You fiend," he yawned, not caring if she was on his phone. Other couples might view the act as a breach of privacy. But he used hers all the time, currently plucking the purple one off the night stand to check what time it was. "..'s eaaaarly," he murmured, putting the phone down and pulling his out of her hand mid text so he could wrap her up in his arms. He rolled them onto their sides, kissing at her neck as she giggled. He was relishing the feeling of waking up beside her, still love drunk from their night together. It had taken him so long to get over the anxiety of moving to this step in their relationship and now he wondered what he had ever been afraid of.

"Mmm… no escape, Mr. Flynn," she purred, leaning into his kisses as she wound her arms around his shoulders. She inhaled deeply as she felt his tongue against her skin, a yearning warmth building up inside her. A manifestation of everything she had ever felt for him since they were children. She adored that she now had an outlet for said feelings. Her hand found its way into is hair, brushing past the velvet soft buzzed section on the back of his neck and up into the messy shock of fiery red-orange strands.

A thousand cheesy Bond-movie cliché comebacks rolled through Phineas' mind, intent on continuing the banter they had started. But his lips couldn't be bothered to part with her body. He was addicted to her. Her scent. Her taste. He doubted he would ever find a cure and was completely content to perish from her charms.

His kiss left the nape of her neck to seek out her full lips as his hand reached under the pillow, feeling around for their stash of little foiled packages. He mentally cursed himself when his fingers only grasped bed sheets. He had misjudged how much 'practicing' they had done last night. His kiss slowed and he opened his eyes to look down at his dark haired goddess. He swallowed thickly, feeling guilty at the sight of her intense blue gaze urging him to continue his worship of her.

Phineas was very strict with himself on the subject of protection. But… there were plenty of other ways to enjoy the moment that didn't require it. His mouth curled up into a smile and he returned to nibbling on Isabella's lower lip.

Isabella whined into the kiss, realizing what her boyfriend's fumbling around meant. She made a mental note to hit the drug store later and stock up. Just as she was about to break the kiss and attempt to come down from the rising high before they got too carried away, she felt Phineas' hand dip beneath the sheets between their bodies. She inhaled sharply at the contact as his fingers moved south. Humming in delight at the change in plans, she grasped the blanket as he wordlessly insisted they continue. He had this covered.

Phineas grinned as she deepened the kiss to silently thank him. He loved taking her by surprise. He knew her well; years of friendship had given him a thorough knowledge of her person. Her intelligence, her talents, her take charge attitude and dependable nature. But he wanted so badly to know her body as well as he did her mind. He was still working on it, but judging by the desperate noises passing her lips and melting against his, he was getting the hang of it.

Isabella let her head fall back against the pillow as she lost herself in his touch. She hadn't expected the move, her face filling with an intense blush. Either she was extremely sensitive or he was a natural. Regardless, she arched herself against his hand. "I-I'm not even gonna a-ask where you l-learned thiiiis," she trilled.

"Guitar lessons," he purred, kissing the corner of her mouth.

"Then maybe I should show you what I learned in pottery class next," she sighed softly.

Phineas couldn't stop himself from blushing at her implication. He would have asked her to elaborate, but a loud slam from the first floor ceased all other thoughts and movement from the two teens.

The front door.

"Oh..my.. god," Isabella breathed out in a whisper as she and Phineas froze in terror. They both stayed as still as humanely possible for a few tense seconds, hoping and praying they had not just heard the unmistakable sound of the front door slamming.

Phineas cleared his throat softly. "… maybe it's not-"

"ISA! ARE YOU AWAKE?"

All at once, Isabella shoved Phineas off her, scrambling to get out from under the sheets and find clothes. She came from a family with not one, but two backgrounds containing stereotypical mothers who didn't believe in knocking. And her mother upheld those stereotypes like they were her own personal creed. Nor did she see the irony in checking if her daughter was awake by screeching loudly from the bottom of the staircase.

Phineas hit the carpet with a heavy thud, pulling the bed sheet off with him as his girlfriend flew around the room, throwing on a long t-shirt and grabbing a bottle of body spray off her dresser. It was a flurry of movement as she attempted to mask their scent with Cherry Blossom while also yanking a half petrified, half lightheaded, fully naked Phineas off the floor.

"Y-YEAH I'M UP MOM!" Isabella shouted back, shoving the red head across the room towards her closet as he struggled to keep her bed sheets wrapped around himself. "What the heck are they doing home?!" she hissed to herself.

Phineas opened his mouth to say something, but was cut off as the closet door shut in his face. He swallowed his words and held his breath along with the bed sheets. Well… so much for sleeping in.

He stayed put and listened to Isabella 's muffled voice talk to her parents as if she was not currently harboring him in her closet. Neither of the adults sounded suspicious and at one point she had opened the closet enough to toss him his clothes and phone. He dressed and snuck out when he was sure the family was downstairs. It was a simple manner of slipping out her bedroom window and onto the roof, thankful that her backyard gate met up with the side of the house for easy access to the ground. Phineas was feeling very clever as he texted her that they were in the clear. A heart emoticon in response had him breathing easier as he strode down the block towards Baljeet's house.

Much like they had been doing at each other's houses since they were kids, Phineas invited himself in through the back door, finding his brother and friends still in their sleep wear lounging around the kitchen. The group looked up of their breakfast, surprised to see their missing member.

"We were not expecting you until later. Or without paying a ransom," Baljeet muttered into his mug of coffee, making the other two boys snicker.

Phineas slunk over to the half full pot of caffeine, helping himself to some. "Her parents came home early."

The boys erupted into a teasing round of 'ooooooooh'.

"Well yer still alive, so it must not have been that bad," Buford shrugged, returning to his eggs.

Phineas just grinned and leaned against the counter as he nursed his coffee. "Hey, my girl had it covered."

"You hid in a closet, didn't you?" Ferb asked, not looking up from stirring his tea.

Phineas nodded as he swallowed a sip of his drink. "Izzie's reaction time is remarkable considering what we were doing when-"

"Ah ah," Baljeet held up his hand. "We all agreed that none of us wants to have that mental image of you or Isabella ingrained into our minds."

"Like how it's already ingrained in the back seat of our car," Ferb cleared his throat, but his brother swatted at his shoulder with a laugh.

"Oh come off it bro, that back seat was broken in by you and Vanessa. Don't try to act innocent."

"I would never," the green haired boy smirked ever so slightly.

"So other than talk about the ridiculous amount of tail the two of you are getting, what else are we going to do today?" Buford finished off his breakfast.

The boys started to go over different ideas for summer projects they had yet to test out, but Phineas was distracted by the buzz of his cell phone. He smiled at the text message from his one and only, a cheesy threat worded ever so carefully to sound like a super villain daring him to foil her evil scheme. It seemed her parents were none the wiser of their night escapade and they were right back to their antics, having learned no lesson of why their bedrooms should be off limits. The sound of his friends chatting was quickly muffled to background noise as he texted her back, playing along with the apparent theme of the day. He wasn't exactly sure what the guys had planned…

… but he knew what he wanted to do that day.